Tappet silencer



Nov. 27, 1923. 1,475,557

F, M. ALBRECHT TAPPET SILENCER Filed Sept. 14, 1923 EN 27 24 a 25 Erm/mwmwa/gmx Patented Nov. 27, 1923.

FREDERICK M. ALBBECHT, 0F STR-ATFORD, CONNECTICUT.

' TAPPET srnrilvorin.r

YApplication inea september 14, 192e.

To ZZ whom it may concern:

Bc it known that I, FREDERICK M. AL- nnacrrr, a citizen of the UnitedStates, and resident of Stratford, in the county of Fairield and Stateof Connecticut, have invented certain new and useful Improvements inTappet Silencer-s, of which the following is a speciiication. Y

`The present invention relates to a valve tappet silencing device, andhas for an object' to provide a simple and effective means to eliminatethe noise resulting from looseness in the connections and bearings ofthe `push rods and plungers of valve tappet mechanisms.

incertain types oi motors the push rods are provided withna clampingdevice to align and prevent relative rotation of the valve push rod andLpush rod plunger or lifter, and this connection becomes worn in use.vwith the result that the parts become looseand a disagreeable noise isset up. Also the e'fiiciency of the motor is impaired, and the valvetiming becomes inaccurate due to the push rod plunger noty being strucksquarely by the revolving cam.

A further object of the invention, there ii`ore,`is to provide asilencing device which Vmay be connected to the clamping means withfacility, and which will maintain the parts in their proper relation,reducing and compensating for wear, and preventing looseness and theresultant disagreeable noise.

Another object is to provide such a device which will maintain thealignment of the push rodl and push rod plunger, so that the revolvingcam will accurately engage the plunger. A still further object istoprovide a device which will not shift in position, or becomeaccidentally disengaged.

With the above and other, objects in view, an embodiment of theinvention is shown in the accompanying drawings, and this embodimentwill be hereinafter more fully described with reference thereto, and theinvention will be finally vpointed out in the claims.

In the drawings:

Fig. 1 is a side elevation of a portion of a motor, showing a device,according to the present` embodiment of the invention attached thereto;

Fig. 2 is an enlarged front view showing the device and the cooperatingparts of the push rod and plunger;

serial No. 662,605.

Fig- 3 is a side view thereof;

Fig. 4 ,is a transverse horizontal sectional view taken along the line 44 of Fig. 2; an v E ig. 5 is a perspective view Vof the device.

`Similar.reference characters indicate corresponding parts throughout.the Several figures, of .the drawings.

Referring to the drawings, the engine 10 is provided.,with a Vpush rodplunger or lifterll, operating. through the bearin 12, and adapted to beengaged and lifte periodically by its `cam onrthe cam shaft, in the.usual manner to raise. the push rod 13, which in turn opens the valve.rIhe plunger andpushrod are connected by arclamping` devicepin the formof a semi-circular clamp 14, having vertical side flanges 15 and 16 thatlit into vertically disposed ref)L istering slots17 and 18 formed in thea justing nut 19 at the lower end of the push rod and in the plunger, sothat relative roitationl of the parts is revented. A space is providedbetween the inner surfacev of the clamp and the nut 19 and plunger.

The silencing device, .according to the present embodiment of theinvention, comprisesa Ufshaped lower member 20 formed from wire, havinga slight. angular bend interm'ediately, its ends, and provided at itslower extremities withloclcing shoulders 21 and,.22. This member isadapted to engage in the space between the clamp and plunger ink thecorners. formed by the angesl and 16, the shoulders 21 and 22 engagingthe lower end of Ythe clamping` device and 4thereby retaining the memberagainst disengagement. A U-shaped upper member23 is provided at its-endswith eyes 24` and 25 which are hingedly engagedupon the transverseportion of the member 20, the transverse portion vofthemernber23-beingvbent, as. at 26, in a manner to embrace the push rod. Themember 23 is furthermore provided with a slight angular bendintermediate its ends, so that lthe side portions extend for aI portionof their length along the sides of the push rod.

The two members are held tightly and resiliently in engagement with theclamping device and the push rod by means of a y coil spring 27,provided on the transverse portion of the member 20, and having its ends28 and 29 bent about the opposed side portions of the two members.

lic

The device, it Will be noted, constantlyeXerts yielding pressure on theclamp 14,

and furthermore maintains the alignment of I have illustrated anddescribed a pre-Y ferred and satisfactory embodiment of the invention,but it Will be obvious that changes maybe made therein, Within thespirit and scope thereof, as deined in the appended claims.v

Having thus described my invention, What I claim and desire to secure byLetters Patentvis:

1. The combination With a valve push rod, a lifter plunger, and a clampmember connecting them together, of a silencing device comprising amember connectedto said clamp member, a member hingedlyconnected theretoand engaging the side of said push rod, and spring meansA adapted toyieldingly press said members into relation with said clamp member andpush rod.

VS2. rEhe combination With a valve push rod, a lifter plunger, and aclamp member connecting them together, of a silencingdevice comprising aU-shaped member having its ends engaged with said clamp member, a secondU-shaped member having its ends hinged] y connected to the'transverse'pontion of said iirst member and Vhaving its transverse"portion bent to embrace said push rod, and spring means adapted toyieldinglyy memb verse portion and having its ends bentinto Y tingrelation tov said side flanges,and spring pressed means engaging saidpush rod and exerting pressure 'against said side portions Within saidclampY member.

"5. rlhe combination With a valve push rod, a lifter plunger, and aclamp member of semiJcircula-'r form having vertical side flangesengaging registering slots` in said push rod and plunger', of asilencing @device comprising a member having side portions engagedwithin said clamp member in abuttingV relation to said side flanges,shoulders at the lower ends of said side portions engaging beneath thelower edge of said clamp member, and spring pressed means engaging saidpush rod and exerting pressure against said side portions Within saidclamp er. 1 6. The combination with a valve push rod, a lifter plunger,and a clamp mem-'ber or semi-circular form having vertical side flangesengaging registering slots inV said push rod and plunger, of a silencingdevice comprising a U-shaped member having "substantially parallel sideportions engaged Within said clamp member in abutting relation to saidside flanges, a second U-shaped member having its ends hingedlyconnected to the transverse portion of said first lmember and having'its transverse portion bent to embrace said push rod, and spring'meansadapted to yieldingly press said members vinto relation with saidclamp'member and push rod. f

Signed at Bridgeport, in the County of f Fairiield and State ofConnecticut 'this 28Y day of duly, A. D., 1923.

FREDERCK M. ALBRECHT. Witnessesz 1 LEONARD E. HOLMES, VD'Avn) J. DINAN.

